Blew up the gearing in my 125 pit bike and because of the price and favorable reviews, decided to replace the entire engine with this one. Like others, I was concerned seeing it packed in a trash bag but all the parts were there and went together perfectly, even came with a bigger carb.. Minarelli Main Jet Kit for 50cc/90cc 2-stroke Mikuni Style carburetors includes a size range from #70 - #115. Available in 10 piece or 50 piece set.. MIDIYA Ignition Key Switch, Universal 3 Wire Engine Starter Switch for Car, Motorcycle, Tractor, Forklift, Truck, Scooter, Trailer, Agricultural,Modified Car, 50cc 90cc 110cc 125cc 150cc 250cc Pit Qu.